We present theoretical calculations for polarization and ellipticity of high-order harmonics from aligned N₂, CO₂, and O₂ molecules generated by linearly polarized lasers. Within the rescattering model, the two polarization amplitudes of the harmonics are determined by the photo-recombination amplitudes for photons emitted with polarization parallel or perpendicular to the direction of the same returning electron wave packet. Our results show clear species-dependent polarization states, in excellent agreement with experiments. We further note that the measured polarization ellipse of the harmonic furnishes the needed parameters for a "complete" experiment in molecules.
A. Le et al., "Polarization and Ellipticity of High-Order Harmonics from Aligned Molecules Generated by Linearly Polarized Intense Laser Pulses," Physical Review A - Atomic, Molecular, and Optical Physics, vol. 82, no. 2, American Physical Society (APS), Aug 2010.
The definitive version is available at https://doi.org/10.1103/PhysRevA.82.023814
Keywords and Phrases
Aligned Molecules; Electron Wave Packet; High Order Harmonics; Intense Laser Pulse; Linearly Polarized; Linearly Polarized Lasers; Polarization Amplitudes; Polarization Ellipse; Polarization State; Rescattering Model; Theoretical Calculations, Harmonic Analysis; Molecules; Pulsed Laser Applications, Polarization
International Standard Serial Number (ISSN)
Article - Journal
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